﻿#region MIT Licence
/*
 * Copyright (C) 2014 PdfCreative
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 * sublicense, and/or sell copies of the Software, and to permit persons to whom 
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included 
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE 
 * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

using PdfCreative.Pdf.Writer.Utilities;

namespace PdfCreative.Pdf.Writer
{
    /// <summary>
    /// The PdfValue class is the base class for all PDF values (object references, lists, dictionaries and primitives).
    /// It is an abstract class and cannot be instantiated.
    /// </summary>
    public abstract class PdfValue
    {
        // Public methods
        // ==============
        #region Public methods
        /// <summary>
        /// Reads the integer value of the specified PDF value.
        /// </summary>
        /// <param name="value">The PDF value</param>
        /// <returns>Its integer value.</returns>
        public static int ReadInt32(PdfValue value)
        {
            int result = 0;

            if (null != value)
                result = ConversionUtilities.ReadInt32(value.ToString());

            return result;
        }

        /// <summary>
        /// Writes the value to the specified PDFValueWriter instance.
        /// </summary>
        /// <param name="writer"></param>
        internal abstract void Write(IPdfValueWriter writer);
        #endregion
    }
}
